Hi guys,
We are making a dob mount for an intes MN61 and i need advice about on construction
The scope weighs 9kg...With accessories should be about 10kg
How thick should my plywood be?
Is number of plys very important?
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Altitude bearings:
Material: teflon pads and ??? aluminium ???
Diameter of bearing?
Larger bearings should give better control but it may add bulk.
Angular separation between bearing surfaces?
Larger angular separation should cause the weight of the scope to exert a larger natural "clamping force" or friction.
Too small and the scope might tilt when changing eyepieces, etc.
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Azimuth bearing:
Material: a suitable pair is teflon and plastic laminate (from what i read)
Diameter of bearing? The larger it is, the more stable. but can add bulk also.
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And also...
Where do i buy plywood, teflon pads and plastic laminate?
Thank you
ATM dob mount for newtonian tube
ATM dob mount for newtonian tube
K.L. Lee
Hi Kun Loong,
May I know which club is building this?
I think there are too many questions here... Have you all decided on which plans you all are going to use for the mount yet? There are many plans on the internet and they will guide you to what materials and substitutes you can use for a dob mount.
For a start, furnitute slides and vinyl discs make viable substitutes for teflon pads and plastic laminate. Plywood can be cut and bought from woodworking shops found in the yellow pages. You can get a good deal if you call and ask around.
Cheers,
Chris
May I know which club is building this?
I think there are too many questions here... Have you all decided on which plans you all are going to use for the mount yet? There are many plans on the internet and they will guide you to what materials and substitutes you can use for a dob mount.
For a start, furnitute slides and vinyl discs make viable substitutes for teflon pads and plastic laminate. Plywood can be cut and bought from woodworking shops found in the yellow pages. You can get a good deal if you call and ask around.
Cheers,
Chris
Hi, perhaps you could give the diameter of the tube too? And since it's a mak-newt, i suppose most of the weight is distributed evenly and not at the rear of the OTA?
You can try borrowing this book from most libraries:
Making and Enjoying Telescopes by Robert Miller and Kenneth Wilson
http://www.amazon.com/Making-Enjoying-T ... 0806912782
There're a couple of dobsonian projects listed in the book so u can get some ideas from there.
I'm sure there're a couple of ATM gurus out here. Hope to get some advice from you
Cheers
You can try borrowing this book from most libraries:
Making and Enjoying Telescopes by Robert Miller and Kenneth Wilson
http://www.amazon.com/Making-Enjoying-T ... 0806912782
There're a couple of dobsonian projects listed in the book so u can get some ideas from there.
I'm sure there're a couple of ATM gurus out here. Hope to get some advice from you
Cheers
The San Francisco Sidewalk Astronomers have good plans and explanations on materials, tools, sources, etc. I found them quite helpful:
http://members.aol.com/sfsidewalk/cdobplans.htm
Cheers,
Chris
http://members.aol.com/sfsidewalk/cdobplans.htm
Cheers,
Chris